Motion trajectory of different fruiting types of Camellia oleifera fruit under vibration: Theoretical and experimental studies

作者：Fanyu Wang, Jian Zhao, Yujun Liu, Tianyu Wang, Hezheng Wang, Sihan Chen, Jianbo Zhou, Dong Zhao · 发表于：Industrial Crops and Products · 年份：2025 · DOI：10.1016/j.indcrop.2025.121173 · 被引用次数：2 · 研究领域：Tree Root and Stability Studies、Polysaccharides and Plant Cell Walls、Leaf Properties and Growth Measurement

Camellia oleifera , an important oil crop in China and worldwide, is widely used in washing, food, medical, industrial products, and the harvest of Camellia oleifera fruit necessitates efficient collection operations. The vibration shedding mode of the fruit under different factors is an important basis for the development of intelligent fruit harvesting equipment. In this study, we established a Camellia oleifera branch-stalk-fruit vibration system dynamics model, built a branch vibration platform, and used a high-speed camera system to study the fruit movement trajectory under different branch lengths, hanging fruit modes, and vibration parameters. The motion trajectory of a hanging fruit with a branch length less than or equal to 10 cm exhibited a Lissajous trajectory. This trajectory was a superposition of two simple harmonic motions at frequencies above 4 Hz in the vertical direction. For a hanging fruit with a branch length exceeding 10 cm, the motion trajectory exhibited an arc swing analogous to that of a nonlinear pendulum. This trajectory gave rise to the jumping and mutation motions of a nonlinear pendulum at frequencies exceeding 4 Hz. The movement range and swing amplitude of the fruit hanging from the middle of the branch were larger than those of the fruit hanging from the end of the branch. Furthermore, the frequency required for the fruit to fall was lower than that required to excite the fruit hanging from the end of the branch. A vibration harvesting method...